Edelbrock performer heads

I purchased a pair of edelbrock performer heads for my 440
It came with two hold down bolts for the rocker shafts
Do they have to be used instead of the original bolts?
The bolts have an upward extended and threaded section
They look too tall for the valve covers. Edelbrock put me on hold for an hour and still couldn’t answer my question
Shutudown4

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